\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
In a group of 40 employees, 25 work in sales (\(S\)), 20 in marketing (\(M\)), and 12 in both. How many employees:
  • work in at least one department?
  • work in sales but not marketing?
  • work in exactly one department?
  • work in neither department?